/*!
 *  mixins.less
 *
 *  copyright 2012 frapwings, kazuya kawaguchi (@kazu_pon)
 *  licensed under MIT license
 *  http://www.opensource.org/licenses/mit-license.php
 */

.clearfix () {
  zoom: 1;
  &:before,
  &:after {
    display: table;
    content: "";
    zoom: 1;
  }
  &:after {
    clear: both;
  }
}

.center-block () {
  display: block;
  margin: 0 auto;
  text-align: center;
}

.tab-focus() {
  // Default
  outline: thin dotted #333;
  // Webkit
  outline: 5px auto -webkit-focus-ring-color;
  outline-offset: -2px;
}

// IE7 inline-block
.ie7-inline-block() {
  *display: inline; /* IE7 inline-block hack */
  *zoom: 1;
}

// IE7 likes to collapse whitespace on either side of the inline-block elements.
// Ems because we're attempting to match the width of a space character. Left
// version is for form buttons, which typically come after other elements, and
// right version is for icons, which come before. Applying both is ok, but it will
// mean that space between those elements will be .6em (~2 space characters) in IE7,
// instead of the 1 space in other browsers.
.ie7-restore-left-whitespace() {
*margin-left: .3em;
  &:first-child {
    *margin-left: 0;
  }
}

.ie7-restore-right-whitespace() {
*margin-right: .3em;
  &:last-child {
    *margin-left: 0;
  }
}

.placeholder(@color: @placeholderText) {
  :-moz-placeholder {
    color: @color;
  }
  ::-webkit-input-placeholder {
    color: @color;
  }
}

#font {
  #family {
    .serif() {
      font-family: Georgia, "Times New Roman", Times, serif;
    }
    .sans-serif() {
      font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    }
    .monospace() {
      font-family: Menlo, Monaco, "Courier New", monospace;
    }
  }
  .shorthand(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
  .serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .serif;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
  .sans-serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .sans-serif;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
  .monospace(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .monospace;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
}

#mixins {
  .fixed-container (@containerWidth: 960px) {
    width: @containerWidth;
    margin-left: auto;
    margin-right: auto;
   .clearfix();
  }
}

// Grid
#grid {

  .core (@gridColumnWidth, @gridSpaceWidth) {

    .columnX (@index) when (@index > 0) {
      (~".column@{index}") { .column(@index); }
      .columnX(@index - 1);
    }
    .columnX (0) {}

    .offsetX (@index) when (@index > 0) {
      (~".offset@{index}") { .offset(@index); }
      .offsetX(@index - 1);
    }
    .offsetX (0) {}

    .offset (@columns) {
      margin-left: (@gridColumnWidth * @columns) + (@gridSpaceWidth * (@columns - 1)) + (@gridSpaceWidth * 2);
    }

    .column (@columns) {
      width: (@gridColumnWidth * @columns) + (@gridSpaceWidth * (@columns - 1));
    }

    .row {
      margin-left: @gridSpaceWidth * -1;
      .clearfix();
    }

    [class*="column"] {
      float: left;
      margin-left: @gridSpaceWidth;
    }

    // Set the container width, and override it for fixed navbars in media queries
    .container,
    .navigation-fixed-top .container,
    .navigation-fixed-bottom .container { .column(@gridColumns); }

    // generate .columnX and .offsetX
    .columnX (@gridColumns);
    .offsetX (@gridColumns);

  }

  .flexible (@flexibleGridColumnWidth, @flexibleGridSpaceWidth) {

    .columnX(@index) when (@index > 0) {
      (~"> .column@{index}") { .column(@index); }
      .columnX(@index - 1);
    }
    .columnX (0) {}

    .column (@columns) {
      width: (@flexibleGridColumnWidth * @columns) + (@flexibleGridSpaceWidth * (@columns - 1));
    }

    .flexible-row {
      width: 100%;
      .clearfix();
      > [class*="column"] {
        float: left;
        margin-left: @flexibleGridSpaceWidth;
      }
      > [class*="column"]:first-child {
        margin-left: 0;
      }

      // generate .columnX
      .column (@gridColumns);
    }

  }

  .input(@gridColumnWidth, @gridSpaceWidth) {

    .columnX (@index) when (@index > 0) {
      (~"input.column@{index}, textarea.column@{index}, .uneditable-input.column@{index}") { .column(@index); }
      .columnX(@index - 1);
    }
    .columnX (0) {}

    .column(@columns) {
      width: ((@gridColumnWidth) * @columns) + (@gridSpaceWidth * (@columns - 1)) - 10;
    }

    input,
    textarea,
    .uneditable-input {
      margin-left: 0; // override margin-left from core grid system
    }

    // generate .columnX
    .columnX (@gridColumns);

  }

}

// Block level inputs
.input-block-level {
  display: block;
  width: 100%;
  min-height: 28px; // Make inputs at least the height of their button counterpart
  //  Makes inputs behave like true block-level elements
  .box-sizing(border-box);
}

// Mixin for form field states
.formFieldState(@textColor: #555, @borderColor: #ccc, @backgroundColor: #f5f5f5) {
  // Set the text color
  > label,
  .help-block,
  .help-inline {
    color: @textColor;
  }
  // Style inputs accordingly
  input,
  select,
  textarea {
    color: @textColor;
    border-color: @borderColor;
    &:focus {
      border-color: darken(@borderColor, 10%);
      .box-shadow(0 0 6px lighten(@borderColor, 20%));
    }
  }
  // Give a small background color for input-prepend/-append
  .input-prepend .add-on,
  .input-append .add-on {
    color: @textColor;
    background-color: @backgroundColor;
    border-color: @textColor;
  }
}

.border-radius (@radius: 5px) {
  -webkit-border-radius: @radius;
  -moz-border-radius: @radius;
  border-radius: @radius;
}

.border-top-right-radius (@radius: 5px) {
  -webkit-border-top-right-radius: @radius;
  -moz-border-top-right-radius: @radius;
  border-top-right-radius: @radius;
}

.border-top-left-radius (@radius: 5px) {
  -webkit-border-top-left-radius: @radius;
  -moz-border-top-left-radius: @radius;
  border-top-left-radius: @radius;
}

.border-bottom-right-radius (@radius: 5px) {
  -webkit-border-bottom-right-radius: @radius;
  -moz-border-bottom-right-radius: @radius;
  border-bottom-right-radius: @radius;
}

.border-bottom-left-radius (@radius: 5px) {
  -webkit-border-bottom-left-radius: @radius;
  -moz-border-bottom-left-radius: @radius;
  border-bottom-left-radius: @radius;
}

.box-shadow(@shadow: 0 1px 3px rgba(0, 0, 0, .25)) {
  -webkit-box-shadow: @shadow;
  -moz-box-shadow: @shadow;
  box-shadow: @shadow;
}

.transition(@transition) {
  -webkit-transition: @transition;
  -moz-transition: @transition;
  -ms-transition: @transition;
  -o-transition: @transition;
  transition: @transition;
}

// Background clipping
// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
.background-clip(@clip) {
  -webkit-background-clip: @clip;
  -moz-background-clip: @clip;
  background-clip: @clip;
}

.box-sizing(@boxmodel) {
  -webkit-box-sizing: @boxmodel;
  -moz-box-sizing: @boxmodel;
  -ms-box-sizing: @boxmodel;
  box-sizing: @boxmodel;
}

.opacity(@opacity: 100) {
  opacity: @opacity / 100;
  filter: ~"alpha(opacity=@{opacity})";
}

.gradientBar(@primaryColor, @secondaryColor) {
  #gradient > .vertical(@primaryColor, @secondaryColor);
  border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
  border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
}

#gradient {
  .horizontal(@startColor: #555, @endColor: #333) {
    background-color: @endColor;
    background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
    background-image: -ms-linear-gradient(left, @startColor, @endColor); // IE10
    background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(left, @startColor, @endColor); // Le standard
    background-repeat: repeat-x;
    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",@startColor,@endColor)); // IE9 and down
  }
  .vertical(@startColor: #555, @endColor: #333) {
    background-color: mix(@startColor, @endColor, 60%);
    background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
    background-image: -ms-linear-gradient(top, @startColor, @endColor); // IE10
    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(top, @startColor, @endColor); // The standard
    background-repeat: repeat-x;
    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",@startColor,@endColor)); // IE9 and down
  }
  .directional(@startColor: #555, @endColor: #333, @deg: 45deg) {
    background-color: @endColor;
    background-repeat: repeat-x;
    background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
    background-image: -ms-linear-gradient(@deg, @startColor, @endColor); // IE10
    background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(@deg, @startColor, @endColor); // The standard
  }
  .vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
    background-color: mix(@midColor, @endColor, 80%);
    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
    background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
    background-image: -ms-linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-repeat: no-repeat;
    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",@startColor,@endColor)); // IE9 and down, gets no color-stop at all for proper fallback
  }
  .radial(@innerColor: #555, @outerColor: #333)  {
    background-color: @outerColor;
    background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
    background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
    background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
    background-image: -ms-radial-gradient(circle, @innerColor, @outerColor);
    background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
    background-repeat: no-repeat;
    // Opera cannot do radial gradients yet
  }
  .striped(@color, @angle: -45deg) {
    background-color: @color;
    background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255,255,255,.15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255,255,255,.15)), color-stop(.75, rgba(255,255,255,.15)), color-stop(.75, transparent), to(transparent));
    background-image: -webkit-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: -moz-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: -ms-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
  }
}

// Reset filters for IE
.reset-filter() {
  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
}

// Dividers (basically an hr) within dropdowns and nav lists
.navigation-divider() {
  height: 1px;
  margin: ((@baseLineHeight / 2) - 1) 1px; // 8px 1px
  overflow: hidden;
  background-color: #e5e5e5;
  border-bottom: 1px solid @white;

  // IE7 needs a set width since we gave a height. Restricting just
  // to IE7 to keep the 1px left/right space in other browsers.
  // It is unclear where IE is getting the extra space that we need
  // to negative-margin away, but so it goes.
  *width: 100%;
  *margin: -5px 0 5px;
}

.buttonBackground(@startColor, @endColor) {
  // gradientBar will set the background to a pleasing blend of these, to support IE<=9
  .gradientBar(@startColor, @endColor);
  .reset-filter();
  // in these cases the gradient won't cover the background, so we override
  &:hover, &:active, &.active, &.disabled, &[disabled] {
    background-color: @endColor;
  }
  // IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
  &:active,
  &.active {
    background-color: darken(@endColor, 10%) e("\9");
  }
}

// Vertically center elements in the navbar.
// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
.navigationbarVerticalAlign(@elementHeight) {
  margin-top: (@navigationbarHeight - @elementHeight) / 2;
}

